6-(3-Methyl-but-2-enyl)-1,3-dihydro-indol-2-one, annonidine F [3-[6-(3-methyl-but-2-enyl)-1H-indolyl]-6-(3-methyl-but-2-enyl)-1H-indole], 1H-indole-5-carbaldehyde, 6-(3-methyl-2-butenyl)-1H-indole, 6-(3-methyl-buta-1,3-dienyl)-1H-indole, 6-(4-oxo-but-2-enyl)-1H-indole and 3-geranylindole were
Four dimeric prenylindoles occurring in diastereomeric pairs, the caulindole A-D, 5-(3-methyl-2-butenyl)-1H-indole, and (E)-5-(3-methylbuta-1,3-dienyl)-1H-indole were isolated from the stem and root barks of Isolona cauliflora, an ecologically endangered Annonaceae species. Structural determination